如何确保任意数量的权重之和为1（Python）？

Question

I have a simulated annealing algorithm and I have a function like

result = w1*x1 + w2*x2 + ... + wn*xn

every loop of the simulated annealing when new w values are chosen how do you make sure that the sum of w always equal to 1 and that no individual w value is less that 0?

Thank you very much folks!

Answer 1

1. Use NumPy.
2. That way, instead of result = w1*x1 + w2*x2 + ... + wn*xn you can do result = np.dot(w, x) .

3. The condition you want on w seems like it could come from:

    non_negative_w = np.abs(w) sum_w = np.sum(non_negative_w) normalized_non_negative_w = non_negative_w / sum_w